[Mono-dev] "fixed" as modifier

Jonathan Pryor jonpryor at vt.edu
Mon Jul 24 05:55:24 EDT 2006

On Mon, 2006-07-24 at 02:03 +0200, Jakob Petsovits wrote:
> I'm currently writing a C# LL parser for KDevelop, and use the numerous Mono 
> source files as test cases for the parser. I've mainly been following the
> C# specification, and found something in the Mono sources conflicting with it:
> In mcs/tests/gtest-166.cs, there are field declarations where "fixed" is not 
> used as statement, but as modifier for the variable. Quote:
> public unsafe struct TestNew {
>     private fixed char test_1 [128];
>     public fixed bool test2 [4];
>     public fixed int T [2];
>     public fixed bool test20 [4], test21 [40];
>     (...)
> }


> Should this be compilable even if it's not specified? Is it a mono bug?
> Can someone tell me more about this?

`fixed' in this context is a Microsoft extension which Mono supports;


It allows for simple and efficient fixed-size buffers (the alternatives
are mentioned at

I'm not sure why it hasn't been standardized yet.

 - Jon

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